John Carmichael commented; >Anyway, I've been thinking that for some future project, that it would be >possible to attach the gnomon to the SGS using a magnet.
Perhaps you should consider using the new 'rare earth magnets'. These are available in a variety of sizes but the tiny discs have phenomenal attractive power. A pair face to face are extremely difficult to separate with fingers. They are not expensive and are worth buying just to experience their astonishing attractive force as plaything/curiosities. http://www.rare-earth-magnets.com/ has some details but a Google search will give lots of info. Tony Moss. -
